在 Spring Boot 应用中，如果用了 FeignClient 来描述远端接口，可以在 application.yml 或其他等同作用的配置文件中，加入下面的配置来使 Feign 发起的请求都打印在日志中：

feign:
  client:
    config:
      default:
        loggerLevel: basic

loggerLevel：

• NONE, No logging (DEFAULT).
• BASIC, Log only the request method and URL and the response status code and execution time.
• HEADERS, Log the basic information along with request and response headers.
• FULL, Log the headers, body, and metadata for both requests and responses.

把相应的大写改成小写即可。

参考

• Declarative REST Client: Feign
• Feign Logging